Tennis - 2019 Nitto ATP Finals at The O2 - Day Seven<br /> <br /> Semi Finals: Stefanos Tsitsipas (Greece) Vs. Roger Federer (Switzerland) <br /> <br /> Roger Federer (Switzerland) with a backhand return<br /> <br /> COLORSPORT/DANIEL BEARHAM<br /> <br /> COLORSPORT/DANIEL BEARHAM
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